EP2228369A1 - Pyrazolderivate als modulatoren von proteinkinase - Google Patents

Pyrazolderivate als modulatoren von proteinkinase Download PDF

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Publication number
EP2228369A1
EP2228369A1 EP10168024A EP10168024A EP2228369A1 EP 2228369 A1 EP2228369 A1 EP 2228369A1 EP 10168024 A EP10168024 A EP 10168024A EP 10168024 A EP10168024 A EP 10168024A EP 2228369 A1 EP2228369 A1 EP 2228369A1
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EP
European Patent Office
Prior art keywords
phenyl
pyrazol
group
chloro
methyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10168024A
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English (en)
French (fr)
Inventor
Valerio Berdini
Gordon Saxty
Marinus Leendert Verdonk
Steven John Woodhead
Paul Graham Wyatt
Robert George Boyle
Hannah Fiona Sore
David Winter Walker
Ian Collins
Robert Downham
Robin Arthur Ellis Carr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Cancer Research
Cancer Research Technology Ltd
Astex Therapeutics Ltd
Original Assignee
Institute of Cancer Research
Cancer Research Technology Ltd
Astex Therapeutics Ltd
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Filing date
Publication date
Priority claimed from GB0329617A external-priority patent/GB0329617D0/en
Application filed by Institute of Cancer Research, Cancer Research Technology Ltd, Astex Therapeutics Ltd filed Critical Institute of Cancer Research
Publication of EP2228369A1 publication Critical patent/EP2228369A1/de
Withdrawn legal-status Critical Current

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    • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
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Definitions

  • This invention relates to pyrazole-containing aryl- and heteroaryl-alkylamine compounds that inhibit or modulate the activity of protein kinase B (PKB) and protein kinase A (PKA), to the use of the compounds in the treatment or prophylaxis of disease states or conditions mediated by PKB and PKA, and to novel compounds having PKB and PKA inhibitory or modulating activity. Also provided are pharmaceutical compositions containing the compounds and novel chemical intermediates.
  • Uncontrolled signalling due to defective control of protein phosphorylation has been implicated in a number of diseases, including, for example, inflammation, cancer, allergy/asthma, diseases and conditions of the immune system, diseases and conditions of the central nervous system, and angiogenesis.
  • Apoptosis or programmed cell death is an important physiological process which removes cells no longer required by an organism. The process is important in early embryonic growth and development allowing the non-necrotic controlled breakdown, removal and recovery of cellular components. The removal of cells by apoptosis is also important in the maintenance of chromosomal and genomic integrity of growing cell populations.
  • Cancerous cells consistently contain numerous mutations, errors or rearrangements in their chromosomal DNA. It is widely believed that this occurs in part because the majority of tumours have a defect in one or more of the processes responsible for initiation of the apoptotic process. Normal control mechanisms cannot kill the cancerous cells and the chromosomal or DNA coding errors continue to be propagated. As a consequence restoring these pro-apoptotic signals or suppressing unregulated survival signals is an attractive means of treating cancer.
  • the enzyme PI3K is activated by a range of growth and survival factors e.g. EGF, PDGF and through the generation of polyphosphatidylinositols, initiates the activation of the downstream signalling events including the activity of the kinases PDK1 and protein kinase B (PKB) also known as Akt.
  • PKB is a protein ser/thr kinase consisting of a kinase domain together with an N-terminal PH domain and C-terminal regulatory domain.
  • the enzyme PKB itself is phosphorylated on Thr 308 by PDK1 and on Ser 473 by an as yet unidentified kinase. Full activation requires phosphorylation at both sites whilst association between PIP3 and the PH domain is required for anchoring of the enzyme to the cytoplasmic face of the lipid membrane providing optimal access to substrates.
  • Activated PKB in turn phosphorylates a range of substrates contributing to the overall survival response. Whilst we cannot be certain that we understand all of the factors responsible for mediating the PKB dependent survival response, some important actions are believed to be phosphorylation and inactivation of the pro-apoptotic factor BAD and caspase 9, phosphorylation of Forkhead transcription factors e.g. FKHR leading to their exclusion from the nucleus, and activation of the NfkappaB pathway by phosphorylation of upstream kinases in the cascade.
  • Forkhead transcription factors e.g. FKHR leading to their exclusion from the nucleus
  • NfkappaB pathway by phosphorylation of upstream kinases in the cascade.
  • the enzyme In addition to the anti-apoptotic and pro-survival actions of the PKB pathway, the enzyme also plays an important role in promoting cell proliferation. This action is again likely to be mediated via several actions, some of which are thought to be phosphorylation and inactivation of the cyclin dependent kinase inhibitor of p21 Cip1/WAF1 , and phosphorylation and activation of mTOR, a kinase controlling several aspects of cell growth.
  • the phosphatase PTEN which dephosphorylates and inactivates polyphosphatidylinositols is a key tumour suppressor protein which normally acts to regulate the PI3K/PKB survival pathway.
  • the significance of the PI3K/PKB pathway in tumourigenesis can be judged from the observation that PTEN is one of the most common targets of mutation in human tumours, with mutations in this phosphatase having been found in ⁇ 50% or more of melanomas ( Guldberg et al 1997, Cancer Research 57, 3660-3663 ) and advanced prostate cancers ( Cairns et al 1997 Cancer Research 57, 4997 ).
  • PKB beta has been found to be over-expressed or activated in 10 - 40% of ovarian and pancreatic cancers ( Bellacosa et al 1995, Int. J.
  • the PKB pathway contributes an important survival signal preventing the normal mechanisms by which the immune response is terminated via apoptosis of the activated cell population.
  • autoimmune conditions such as multiple sclerosis and arthritis.
  • Expansion of lymphocyte populations responding inappropriately to foreign antigens is a feature of another set of conditions such as allergic responses and asthma.
  • inhibition of PKB could provide a beneficial treatment for immune disorders.
  • PKB pathway functions in the control of glucose metabolism by insulin.
  • Available evidence from mice deficient in the alpha and beta isoforms of PKB suggests that this action is mediated by the beta isoform.
  • modulators of PKB activity may also find utility in diseases in which there is a dysfunction of glucose metabolism and energy storage such as diabetes, metabolic disease and obesity.
  • Cyclic AMP-dependent protein kinase is a serine/threonine protein kinase that phosphorylates a wide range of substrates and is involved in the regulation of many cellular processes including cell growth, cell differentiation, ion-channel conductivity, gene transcription and synaptic release of neurotransmitters.
  • the PKA holoenzyme is a tetramer comprising two regulatory subunits and two catalytic subunits.
  • PKA acts as a link between G-protein mediated signal transduction events and the cellular processes that they regulate. Binding of a hormone ligand such as glucagon to a transmembrane receptor activates a receptor-coupled G-protein (GTP-binding and hydrolyzing protein). Upon activation, the alpha subunit of the G protein dissociates and binds to and activates adenylate cyclase, which in turn converts ATP to cyclic-AMP (cAMP). The cAMP thus produced then binds to the regulatory subunits of PKA leading to dissociation of the associated catalytic subunits. The catalytic subunits of PKA, which are inactive when associated with the regulatory sub-units, become active upon dissociation and take part in the phosphorylation of other regulatory proteins.
  • the catalytic sub-unit of PKA phosphorylates the kinase Phosphorylase Kinase which is involved in the phosphorylation of Phosphorylase, the enzyme responsible for breaking down glycogen to release glucose.
  • PKA is also involved in the regulation of glucose levels by phosphorylating and deactivating glycogen synthase.
  • modulators of PKA activity may be useful in the treatment or management of diseases in which there is a dysfunction of glucose metabolism and energy storage such as diabetes, metabolic disease and obesity.
  • PKA has also been established as an acute inhibitor of T cell activation.
  • Anndahl et al have investigated the possible role of PKA type I in HIV-induced T cell dysfunction on the basis that T cells from HIV-infected patients have increased levels of cAMP and are more sensitive to inhibition by cAMP analogues than are normal T cells. From their studies, they concluded that increased activation of PKA type I may contribute to progressive T cell dysfunction in HIV infection and that PKA type I may therefore be a potential target for immunomodulating therapy.
  • WOO/07996 discloses substituted pyrazoles having estrogen receptor agonist activity. The compounds are described as being useful in treatingor preventing inter alia estrogen-receptor mediated breast cancer. PKB inhibitory activity is not disclosed.
  • WO 00/31063 discloses substituted pyrazole compounds as p38 kinase inhibitors.
  • WO 03/068230 discloses substituted pyridones as p38 MAP kinase modulators.
  • WO 00/66562 discloses a class of 1-phenyl-substituted pyrazoles for use as anti-inflammatory agents.
  • the 1-phenyl group is substituted by a sulphur-containing substituent as a sulphonamide or sulphonyl group.
  • the invention provides compounds that have protein kinase B (PKB) and protein A (PKA) inhibiting or modulating activity, and which it is envisaged will be useful in preventing or treating disease states or conditions mediated by PKB or PKA.
  • PKB protein kinase B
  • PKA protein A
  • the invention provides a compound of the formula (I): or a salt, solvate, tautomer or N-oxide thereof; wherein A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R 1 and NR 2 R 3 and a maximum chain length of 4 atoms extending between E and NR 2 R 3 , wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from oxo, fluorine and hydroxy, provided that the hydroxy group when present is not located at a carbon atom ⁇ with respect to the NR 2 R 3 group and provided that the oxo group when present is located at a carbon atom ⁇ with respect to the NR 2 R 3 group;
  • E is a monocyclic or bicyclic carbocyclic or heterocyclic group
  • R 1 is an aryl or heteroaryl group
  • R 2 and R 3 are independently selected from hydrogen, C 1 - 4 hydrocarbyl and C 1-4 acyl wherein the hydrocarbyl and acyl moieties are optionally substituted by one or more substituents selected from fluorine, hydroxy, amino, methylamino, dimethylamino and methoxy; or R 2 and R 3 together with the nitrogen atom to which they are attached form a cyclic group selected from an imidazole group and a saturated monocyclic heterocyclic group having 4-7 ring members and optionally containing a second heteroatom ring member selected from O and N; or one of R 2 and R 3 together with the nitrogen atom to which they are attached and one or more atoms from the linker group A form a saturated monocyclic heterocyclic group having 4-7 ring members and optionally containing a second heteroatom ring member selected from O and N; or NR 2 R 3 and the carbon atom of linker group A to which it is attached together form a cyano group; R 4 is selected from hydrogen,
  • the invention also provides a compound of the formula (Ia): or a salt, solvate, tautomer or N-oxide thereof; wherein A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R 1 and NR 2 R 3 and a maximum chain length of 4 atoms extending between E and NR 2 R 3 , wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from oxo, fluorine and hydroxy, provided that the hydroxy group when present is not located at a carbon atom ⁇ with respect to the NR 2 R 3 group and provided that the oxo group when present is located at a carbon atom ⁇ with respect to the NR 2 R 3 group; E is a monocyclic or bicyclic carbocyclic or heterocyclic group;
  • A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R 1 and NR 2 R 3 and a maximum chain length of 4 atoms extending between E and NR 2 R 3 , wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from fluorine and hydroxy, provided that the hydroxy group is not located at a carbon atom ⁇ with respect to the NR 2 R 3 group;
  • E is a monocyclic or bicyclic carbocyclic or heterocyclic group;
  • R 1 is an aryl or heteroaryl group;
  • R 2 and R 3 are independently selected from hydrogen, C 1-4 hydrocarbyl and C 1-4 acyl; or R
  • the invention further provides:
  • the carbocyclic or heterocyclic groups can be aryl or heteroaryl groups having from 5 to 12 ring members, more usually from 5 to 10 ring members.
  • aryl refers to a carbocyclic group having aromatic character and the term “heteroaryl” is used herein to denote a heterocyclic group having aromatic character.
  • the terms “aryl” and “heteroaryl” embrace polycyclic (e.g. bicyclic) ring systems wherein one or more rings are non-aromatic, provided that at least one ring is aromatic. In such polycyclic systems, the group may be attached by the aromatic ring, or by a non-aromatic ring.
  • the aryl or heteroaryl groups can be monocyclic or bicyclic groups and can be unsubstituted or substituted with one or more substituents, for example one or more groups R 10 as defined herein.
  • non-aromatic group embraces unsaturated ring systems without aromatic character, partially saturated and fully saturated carbocyclic and heterocyclic ring systems.
  • the term “fully saturated” refers to rings where there are no multiple bonds between ring atoms.
  • Saturated carbocyclic groups include cycloalkyl groups as defined below.
  • Partially saturated carbocyclic groups include cycloalkenyl groups as defined below, for example cyclopentenyl, cycloheptenyl and cyclooctenyl.
  • heteroaryl groups are monocyclic and bicyclic groups containing from five to twelve ring members, and more usually from five to ten ring members.
  • the heteroaryl group can be, for example, a five membered or six membered monocyclic ring or a bicyclic structure formed from fused five and six membered rings or two fused six membered rings.
  • Each ring may contain up to about four heteroatoms typically selected from nitrogen, sulphur and oxygen.
  • the heteroaryl ring will contain up to 3 heteroatoms, more usually up to 2, for example a single heteroatom.
  • the heteroaryl ring contains at least one ring nitrogen atom.
  • Examples of five membered heteroaryl groups include but are not limited to pyrrole, furan, thiophene, imidazole, furazan, oxazole, oxadiazole, oxatriazole, isoxazole, thiazole, isothiazole, pyrazole, triazole and tetrazole groups.
  • a bicyclic heteroaryl group may be, for example, a group selected from:
  • bicyclic heteroaryl groups containing a six membered ring fused to a five membered ring include but are not limited to benzfuran, benzthiophene, benzimidazole, benzoxazole, benzisoxazole, benzthiazole, benzisothiazole, isobenzofuran, indole, isoindole, indolizine, indoline, isoindoline, purine (e.g., adenine, guanine), indazole, benzodioxole and pyrazolopyridine groups.
  • carbocyclic aryl groups examples include phenyl, naphthyl, indenyl, and tetrahydronaphthyl groups.
  • non-aromatic heterocyclic groups are groups having from 3 to 12 ring members, more usually 5 to 10 ring members. Such groups can be monocyclic or bicyclic, for example, and typically have from 1 to 5 heteroatom ring members (more usually 1, 2, 3 or 4 heteroatom ring members), usually selected from nitrogen, oxygen and sulphur.
  • Examples of monocyclic non-aromatic heterocyclic groups include 5-, 6-and 7-membered monocyclic heterocyclic groups.
  • Particular examples include morpholine, thiomorpholine and its S-oxide and S,S-dioxide (particularly thiomorpholine), piperidine (e.g. 1-piperidinyl, 2-piperidinyl 3-piperidinyl and 4-piperidinyl), N-alkyl piperidines such as N-methyl piperidine, piperidone, pyrrolidine (e.g.
  • the carbocyclic or heterocyclic ring can, unless the context indicates otherwise, be unsubstituted or substituted by one or more substituent groups R 10 selected from halogen, hydroxy, trifluoromethyl, cyano, nitro, carboxy, amino, mono- or di-C 1-4 hydrocarbylamino, carbocyclic and heterocyclic groups having from 3 to 12 ring members; a group R a -R b wherein R a is a bond, O, CO, X 1 C(X 2 ), C(X 2 )X 1 , X 1 C(X 2 )X 1 , S, SO, SO 2 , NR c , SO 2 NR c or NR c SO 2 ; and R b is selected from hydrogen, carbocyclic and heterocyclic groups having from 3 to 12 ring members, and a C 1-8 hydrocarbyl group optionally substituted by one or more substituents selected from hydroxy
  • the two substituents may be linked so as to form a cyclic group.
  • an adjacent pair of substituents on adjacent carbon atoms of a ring may be linked via one or more heteroatoms and optionally substituted alkylene groups to form a fused oxa-, dioxa-, aza-, diaza- or oxa-aza-cycloalkyl group.
  • Examples of such linked substituent groups include:
  • halogen substituents include fluorine, chlorine, bromine and iodine. Fluorine and chlorine are particularly preferred.
  • hydrocarbyl groups include alkyl, cycloalkyl, cycloalkenyl, carbocyclic aryl, alkenyl, alkynyl, cycloalkylalkyl, cycloalkenylalkyl, and carbocyclic aralkyl, aralkenyl and aralkynyl groups. Such groups can be unsubstituted or, where stated, can be substituted by one or more substituents as defined herein.
  • the examples and preferences expressed below apply to each of the hydrocarbyl substituent groups or hydrocarbyl-containing substituent groups referred to in the various definitions of substituents for compounds of the formula (I) unless the context indicates otherwise.
  • alkyl covers both straight chain and branched chain alkyl groups.
  • alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, 2-pentyl, 3-pentyl, 2-methyl butyl, 3-methyl butyl, and n-hexyl and its isomers.
  • C 1-6 alkyl groups such as C 1-4 alkyl groups (e.g. C 1-3 alkyl groups or C 1-2 alkyl groups).
  • cycloalkyl groups are those derived from cyclopropane, cyclobutane, cyclopentane, cyclohexane and cycloheptane. Within the sub-set of cycloalkyl groups the cycloalkyl group will have from 3 to 8 carbon atoms, particular examples being C 3-6 cycloalkyl groups.
  • alkenyl groups include, but are not limited to, ethenyl (vinyl), 1-propenyl, 2-propenyl (allyl), isopropenyl, butenyl, buta-1,4-dienyl, pentenyl, and hexenyl.
  • alkenyl groups will have 2 to 8 carbon atoms, particular examples being C 2-6 alkenyl groups, such as C 2-4 alkenyl groups.
  • cycloalkenyl groups include, but are not limited to, cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclopentadienyl and cyclohexenyl. Within the sub-set of cycloalkenyl groups the cycloalkenyl groups have from 3 to 8 carbon atoms, and particular examples are C 3-6 cycloalkenyl groups.
  • alkynyl groups include, but are not limited to, ethynyl and 2-propynyl (propargyl) groups. Within the sub-set of alkynyl groups having 2 to 8 carbon atoms, particular examples are C 2-6 alkynyl groups, such as C 2-4 alkynyl groups.
  • cycloalkylalkyl, cycloalkenylalkyl, carbocyclic aralkyl, aralkenyl and aralkynyl groups include phenethyl, benzyl, styryl, phenylethynyl, cyclohexylmethyl, cyclopentylmethyl, cyclobutylmethyl, cyclopropylmethyl and cyclopentenylmethyl groups.
  • the number of linear or backbone carbon atoms replaced will correspond to the number of linear or backbone atoms in the group replacing them.
  • groups in which one or more carbon atom of the hydrocarbyl group have been replaced by a replacement atom or group as defined above include ethers and thioethers (C replaced by O or S), amides, esters, thioamides and thioesters (C-C replaced by X 1 C(X 2 ) or C(X 2 )X 1 ), sulphones and sulphoxides (C replaced by SO or SO 2 ), amines (C replaced by NR c ). Further examples include ureas, carbonates and carbamates (C-C-C replaced by X 1 C(X 2 )X 1 ).
  • an amino group may, together with the nitrogen atom to which they are attached, and optionally with another heteroatom such as nitrogen, sulphur, or oxygen, link to form a ring structure of 4 to 7 ring members.
  • R a -R b as used herein, either with regard to substituents present on a carbocyclic or heterocyclic moiety, or with regard to other substituents present at other locations on the compounds of the formula (I), includes inter alia compounds wherein R a is selected from a bond, O, CO, OC(O), SC(O), NR c C(O), OC(S), SC(S), NR c C(S), OC(NR c ), SC(NR c ), NR c C(NR c ), C(O)O, C(O)S, C(O)NR c , C(S)O, C(S)S, C(S) NR c , C(NR c )O, C(NR c )S, C(NR c )NR c , OC(O)O, SC(O)O, NR c C(O)O, OC(S)O, SC(O)O, NR c C(O)
  • R b can be hydrogen or it can be a group selected from carbocyclic and heterocyclic groups having from 3 to 12 ring members (typically 3 to 10 and more usually from 5 to 10), and a C 1-8 hydrocarbyl group optionally substituted as hereinbefore defined. Examples of hydrocarbyl, carbocyclic and heterocyclic groups are as set out above.
  • R a and R b together form a hydrocarbyloxy group.
  • Preferred hydrocarbyloxy groups include saturated hydrocarbyloxy such as alkoxy (e.g. C 1-6 alkoxy, more usually C 1-4 alkoxy such as ethoxy and methoxy, particularly methoxy), cycloalkoxy (e.g. C 3-6 cycloalkoxy such as cyclopropyloxy, cyclobutyloxy, cyclopentyloxy and cyclohexyloxy) and cycloalkyalkoxy (e.g. C 3-6 cycloalkyl-C 1-2 alkoxy such as cyclopropylmethoxy).
  • alkoxy e.g. C 1-6 alkoxy, more usually C 1-4 alkoxy such as ethoxy and methoxy, particularly methoxy
  • cycloalkoxy e.g. C 3-6 cycloalkoxy such as cyclopropyloxy, cyclobutyloxy,
  • the hydrocarbyloxy groups can be substituted by various substituents as defined herein.
  • the alkoxy groups can be substituted by halogen (e.g. as in difluoromethoxy and trifluoromethoxy), hydroxy (e.g. as in hydroxyethoxy), C 1-2 alkoxy (e.g. as in methoxyethoxy), hydroxy-C 1-2 alkyl (as in hydroxyethoxyethoxy) or a cyclic group (e.g. a cycloalkyl group or non-aromatic heterocyclic group as hereinbefore defined).
  • halogen e.g. as in difluoromethoxy and trifluoromethoxy
  • hydroxy e.g. as in hydroxyethoxy
  • C 1-2 alkoxy e.g. as in methoxyethoxy
  • hydroxy-C 1-2 alkyl as in hydroxyethoxyethoxy
  • a cyclic group e.g. a cyclo
  • Alkoxy groups may be substituted by, for example, a monocyclic group such as pyrrolidine, piperidine, morpholine and piperazine and N-substituted derivatives thereof such as N-benzyl, N-C 1-4 acyl and N-C 1-4 alkoxycarbonyl.
  • a monocyclic group such as pyrrolidine, piperidine, morpholine and piperazine and N-substituted derivatives thereof such as N-benzyl, N-C 1-4 acyl and N-C 1-4 alkoxycarbonyl.
  • Particular examples include pyrrolidinoethoxy, piperidinoethoxy and piperazinoethoxy.
  • hydrocarbyl groups R a -R b are as hereinbefore defined.
  • the hydrocarbyl groups may be saturated groups such as cycloalkyl and alkyl and particular examples of such groups include methyl, ethyl and cyclopropyl.
  • the hydrocarbyl (e.g. alkyl) groups can be substituted by various groups and atoms as defined herein.
  • substituted alkyl groups include alkyl groups substituted by one or more halogen atoms such as fluorine and chlorine (particular examples including bromoethyl, chloroethyl, difluoromethyl, 2,2,2-trifluoroethyl and perfluoroalkyl groups such as trifluoromethyl), or hydroxy (e.g. hydroxymethyl and hydroxyethyl), C 1-8 acyloxy (e.g. acetoxymethyl and benzyloxymethyl), amino and mono- and dialkylamino (e.g.
  • halogen atoms such as fluorine and chlorine
  • hydroxy e.g. hydroxymethyl and hydroxyethyl
  • C 1-8 acyloxy e.g. acetoxymethyl and benzyloxymethyl
  • amino and mono- and dialkylamino e.g.
  • aminoethyl methylaminoethyl, dimethylaminomethyl, dimethylaminoethyl and tert -butylaminomethyl
  • alkoxy e.g. C 1-2 alkoxy such as methoxy- as in methoxyethyl
  • cyclic groups such as cycloalkyl groups, aryl groups, heteroaryl groups and non-aromatic heterocyclic groups as hereinbefore defined).
  • alkyl groups substituted by a cyclic group are those wherein the cyclic group is a saturated cyclic amine such as morpholine, piperidine, pyrrolidine, piperazine, C 1-4 -alkyl-piperazines, C 3-7 -cycloalkyl-piperazines, tetrahydropyran or tetrahydrofuran and the alkyl group is a C 1-4 alkyl group, more typically a C 1-3 alkyl group such as methyl, ethyl or n-propyl.
  • a saturated cyclic amine such as morpholine, piperidine, pyrrolidine, piperazine, C 1-4 -alkyl-piperazines, C 3-7 -cycloalkyl-piperazines, tetrahydropyran or tetrahydrofuran
  • the alkyl group is a C 1-4 alkyl group, more typically a C 1-3 alkyl group such as methyl, eth
  • alkyl groups substituted by a cyclic group include pyrrolidinomethyl, pyrrolidinopropyl, morpholinomethyl, morpholinoethyl, morpholinopropyl, piperidinylmethyl, piperazinomethyl and N-substituted forms thereof as defined herein.
  • alkyl groups substituted by aryl groups and heteroaryl groups include benzyl, phenethyl and pyridylmethyl groups.
  • R b can be, for example, hydrogen or an optionally substituted C 1-8 hydrocarbyl group, or a carbocyclic or heterocyclic group.
  • R a -R b where R a is SO 2 NR c include aminosulphonyl, C 1-4 alkylaminosulphonyl and di-C 1-4 alkylaminosulphonyl groups, and sulphonamides formed from a cyclic amino group such as piperidine, morpholine, pyrrolidine, or an optionally N-substituted piperazine such as N-methyl piperazine.
  • R a -R b where R a is SO 2 examples include alkylsulphonyl, heteroarylsulphonyl and arylsulphonyl groups, particularly monocyclic aryl and heteroaryl sulphonyl groups. Particular examples include methylsulphonyl, phenylsulphonyl and toluenesulphonyl.
  • R b can be, for example, hydrogen or an optionally substituted C 1-8 hydrocarbyl group, or a carbocyclic or heterocyclic group.
  • R a -R b where R a is NR c include amino, C 1-4 alkylamino (e.g. methylamino, ethylamino, propylamino, isopropylamino, tert -butylamino), di-C 1-4 alkylamino (e.g. dimethylamino and diethylamino) and cycloalkylamino (e.g. cyclopropylamino, cyclopentylamino and cyclohexylamino).
  • C 1-4 alkylamino e.g. methylamino, ethylamino, propylamino, isopropylamino, tert -butylamino
  • di-C 1-4 alkylamino e.g. dimethyl
  • A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R 1 and NR 2 R 3 and a maximum chain length of 4 atoms extending between E and NR 2 R 3 .
  • the moieties E and R 1 can each be attached at any location on the group A.
  • the linker group has a chain length of 1 atom extending between R 1 and NR 2 R 3 .
  • the linker group has a chain length of 2 atoms extending between R 1 and NR 2 R 3 .
  • the linker group has a chain length of 3 atoms extending between R 1 and NR 2 R 3 .
  • the linker group has a maximum chain length of 3 atoms extending between E and NR 2 R 3 .
  • the linker group has a chain length of 2 or 3 atoms extending between R 1 and NR 2 R 3 and a chain length of 2 or 3 atoms extending between E and NR 2 R 3 .
  • the nitrogen atom may be linked directly to the group E.
  • the carbon atom to which the group R 1 is attached is replaced by an oxygen atom.
  • R 1 and E are attached to the same carbon atom of the linker group, and a carbon atom in the chain extending between E and NR 2 R 3 is replaced by an oxygen atom.
  • the compound of the formula (I) when an oxo group is present at the carbon atom adjacent the NR 2 R 3 group, the compound of the formula (I) will be an amide.
  • the linker group A can have a branched configuration at the carbon atom attached to the NR 2 R 3 group.
  • the carbon atom attached to the NR 2 R 3 group can be attached to a pair of gem-dimethyl groups.
  • X is (CH 2 ) j -CH.
  • R 1 -A-NR 2 R 3 of the compound is represented by the formula R 1 -(G) k -(CH 2 ) m -X-(CH 2 ) n -(CR 6 R 7 ) p -NR 2 R 3 are those wherein:
  • R 1 -A-NR 2 R 3 of the compound is represented by the formula R 1 -(G) k -(CH 2 ) m -W-O b -(CH 2 ) n -(CR 6 R 7 ) p -NR 2 R 3 are those wherein:
  • the portion R 1 -A-NR 2 R 3 of the compound is represented by the formula R 1 -X-(CH 2 ) n -NR 2 R 3 wherein X is attached to the group E and is a group CH, and n is 2.
  • linker group A Particular examples of the linker group A, together with their points of attachment to the groups R 1 , E and NR 2 R 3 , are shown in Table 1 below.
  • Currently preferred groups include A1, A2, A3, A6, A10, A11, A22 and A23.
  • One particular set of groups includes A1, A2, A3, A10 and A11.
  • a further particular set of groups includes A2 and A11.
  • Another particular set of groups includes A6, A22 and A23.
  • a further set of groups includes A1, A2 and A3.
  • the asterisk designates a chiral centre.
  • Compounds having the R configuration at this chiral centre represent one preferred sub-group of compounds of the invention.
  • the group R 1 is an aryl or heteroaryl group and may be selected from the list of such groups set out in the section headed General Preferences and Definitions.
  • R 1 can be monocyclic or bicyclic and, in one preferred embodiment, is monocyclic.
  • monocyclic aryl and heteroaryl groups are six membered aryl and heteroaryl groups containing up to 2 nitrogen ring members, and five membered heteroaryl groups containing up to 3 heteroatom ring members selected from O, S and N.
  • substituents may be present, more typically there are 0, 1, 2, 3 or 4 substituents, preferably 0, 1, 2 or 3, and more preferably 0, 1 or 2.
  • R 2 and R 3 are independently selected from hydrogen, C 1-4 hydrocarbyl and C 1-4 acyl wherein the hydrocarbyl and acyl moieties are optionally substituted by one or more substituents selected from fluorine, hydroxy, amino, methylamino, dimethylamino and methoxy.
  • hydrocarbyl moiety When the hydrocarbyl moiety is substituted by a hydroxy, amino, methylamino, dimethylamino or methoxy group, typically there are at least two carbon atoms between the substituent and the nitrogen atom of the group NR 2 R 3 .
  • substituted hydrocarbyl groups are hydroxyethyl and hydroxypropyl.
  • R 2 and R 3 are independently selected from hydrogen, C 1-4 hydrocarbyl and C 1-4 acyl.
  • the hydrocarbyl group is an alkyl group, more usually a C 1 , C 2 or C 3 alkyl group, and preferably a methyl group.
  • R 2 and R 3 are independently selected from hydrogen and methyl and hence NR 2 R 3 can be an amino, methylamino or dimethylamino group.
  • NR 2 R 3 can be an amino group.
  • NR 2 R 3 can be a methylamino group.
  • the saturated monocyclic heterocyclic group can be unsubstituted or substituted by one or more substituents R 10 as defined above in the General Preferences and Definitions section of this application.
  • any substituents on the heterocyclic group will be relatively small substituents such as C 1-4 hydrocarbyl (e.g. methyl, ethyl, n -propyl, i -propyl, cyclopropyl, n -butyl, sec -butyl and tert- butyl), fluorine, chlorine, hydroxy, amino, methylamino, ethylamino and dimethylamino.
  • Particular substituents are methyl groups.
  • the saturated monocyclic ring can be an azacycloalkyl group such as an azetidine, pyrrolidine, piperidine or azepane ring, and such rings are typically unsubstituted.
  • the saturated monocyclic ring can contain an additional heteroatom selected from O and N, and examples of such groups include morpholine and piperazine. Where an additional N atom is present in the ring, this can form part of an NH group or an N-C 1-4 alkyl group such as an N-methyl, N-ethyl, N-propyl or N-isopropyl group.
  • NR 2 R 3 forms an imidazole group
  • the imidazole group can be unsubstituted or substituted, for example by one or more relatively small substituents such as C 1-4 hydrocarbyl (e.g. methyl, ethyl, propyl, cyclopropyl and butyl), fluorine, chlorine, hydroxy, amino, methylamino, ethylamino and dimethylamino.
  • substituents are methyl groups.
  • one of R 2 and R 3 together with the nitrogen atom to which they are attached and one or more atoms from the linker group A form a saturated monocyclic heterocyclic group having 4-7 ring members and optionally containing a second heteroatom ring member selected from O and N.
  • Such compounds include compounds wherein NR 2 R 3 and A form a cyclic group of the formula: where v and w are each 0, 1, 2 or 3 provided that the sum of v and w falls within the range of 2 to 5.
  • Particular examples of cyclic compounds are those in which v and w are both 2.
  • Such compounds include compounds wherein NR 2 R 3 and A form a cyclic group of the formula: where x and w are each 0, 1, 2 or 3 provided that the sum of x and w falls within the range of 2 to 4.
  • Particular examples of cyclic compounds are those in which x is 2 and w is 1.
  • R 4 is selected from hydrogen, halogen, C 1-5 saturated hydrocarbyl, C 1-5 saturated hydrocarbyloxy, cyano, and CF 3 .
  • carbocyclic and heterocyclic groups are aromatic.
  • Particular examples of the group R 9 are optionally substituted phenyl or benzyl.
  • R 5 is selected from selected from hydrogen, halogen, C 1-5 saturated hydrocarbyl, cyano, CONH 2 , CONHR 9 , CF 3 , NH 2 , NHCOR 9 and NHCONHR 9 where R 9 is optionally substituted phenyl or benzyl.
  • R 5 is selected from selected from hydrogen, halogen, C 1-5 saturated hydrocarbyl, cyano, CF 3 , NH 2 , NHCOR 9 and NHCONHR 9 where R 9 is optionally substituted phenyl or benzyl.
  • the group R 9 is typically unsubstituted phenyl or benzyl, or phenyl or benzyl substituted by 1,2 or 3 substituents selected from halogen; hydroxy; trifluoromethyl; cyano; carboxy; C 1-4 alkoxycarbonyl; C 1-4 acyloxy; amino; mono- or di-C 1-4 alkylamino; C 1-4 alkyl optionally substituted by halogen, hydroxy or C 1-2 alkoxy; C 1-4 alkoxy optionally substituted by halogen, hydroxy or C 1-2 alkoxy; phenyl, five and six membered heteroaryl groups containing up to 3 heteroatoms selected from O, N and S; and saturated carbocyclic and heterocyclic groups containing up to 2 heteroatoms selected from O, S and N.
  • R 5 include hydrogen, fluorine, chlorine, bromine, methyl, ethyl, hydroxyethyl, methoxymethyl, cyano, CF 3 , NH 2 , NHCOR 9b and NHCONHR 9b where R 9b is phenyl or benzyl optionally substituted by hydroxy, C 1-4 acyloxy, fluorine, chlorine, bromine, trifluoromethyl, cyano, C 1-4 hydrocarbyloxy (e.g. alkoxy) and C 1-4 hydrocarbyl (e.g. alkyl) optionally substituted by C 1-2 alkoxy or hydroxy.
  • R 9b is phenyl or benzyl optionally substituted by hydroxy, C 1-4 acyloxy, fluorine, chlorine, bromine, trifluoromethyl, cyano, C 1-4 hydrocarbyloxy (e.g. alkoxy) and C 1-4 hydrocarbyl (e.g. alkyl) optionally substituted by C 1-2 alkoxy
  • R 5 examples include hydrogen, methyl and cyano.
  • R 5 is hydrogen or methyl.
  • bicyclic groups include benzo-fused and pyrido-fused groups wherein the group A and the pyrazole ring are both attached to the benzo- or pyrido- moiety.
  • E is a group: where * denotes the point of attachment to the pyrazole group, and "a” denotes the attachment of the group A; P, Q and T are the same or different and are selected from N, CH and NCR 10 , provided that the group A is attached to a carbon atom; and U, V and R 10 are as hereinbefore defined.
  • R 12a and R 12b include hydrogen and substituent groups R 10 as hereinbefore defined having no more than ten non-hydrogen atoms.
  • Particular examples of R 12a and R 12b include methyl, ethyl, propyl, isopropyl, cyclopropyl, cyclobutyl, cyclopentyl, fluorine, chlorine, methoxy, trifluoromethyl, hydroxymethyl, hydroxyethyl, methoxymethyl, difluoromethoxy, trifluoromethoxy, 2,2,2-trifluoroethyl, cyano, amino, methylamino, dimethylamino, CONH 2 , CO 2 Et, CO 2 H, acetamido, azetidinyl, pyrrolidino, piperidine, piperazino, morpholino, methylsulphonyl, aminosulphonyl, mesylamino and trifluoroacetamido.
  • the substituent group R 13 is selected from methyl, chlorine, fluorine and trifluoromethyl.
  • A is a saturated hydrocarbon linker group containing from 1 to 7 carbon atoms, the linker group having a maximum chain length of 5 atoms extending between R 1 and NR 2 R 3 and a maximum chain length of 4 atoms extending between E and NR 2 R 3 , wherein one of the carbon atoms in the linker group may optionally be replaced by an oxygen or nitrogen atom; and wherein the carbon atoms of the linker group A may optionally bear one or more substituents selected from fluorine and hydroxy, provided that the hydroxy group when present is not located at a carbon atom ⁇ with respect to the NR 2 R 3 group; and R 5 is selected from selected from hydrogen, C 1-5 saturated hydrocarbyl, cyano, CONH 2 , CF 3 , NH 2 , NHCOR 9 and NHCONHR 9 .
  • the various functional groups and substituents making up the compounds of the formula (I) are typically chosen such that the molecular weight of the compound of the formula (I) does not exceed 1000. More usually, the molecular weight of the compound will be less than 750, for example less than 700, or less than 650, or less than 600, or less than 550. More preferably, the molecular weight is less than 525 and, for example, is 500 or less.
  • references to formula (I) included references to formulae (Ia), (Ib), (II), (III), (IV) and (V) and all other sub-groups, preferences and examples thereof as defined herein.
  • Another group of acid addition salts includes salts formed from acetic, adipic, ascorbic, aspartic, citric, DL-Lactic, fumaric, gluconic, glucuronic, hippuric, hydrochloric, glutamic, DL-malic, methanesulphonic, sebacic, stearic, succinic and tartaric acids.
  • a salt may be formed with a suitable cation.
  • suitable inorganic cations include, but are not limited to, alkali metal ions such as Na + and K + , alkaline earth cations such as Ca 2+ and Mg 2+ , and other cations such as Al 3+ .
  • suitable organic cations include, but are not limited to, ammonium ion (i.e., NH 4 + ) and substituted ammonium ions (e.g., NH 3 R + , NH 2 R 2 + , NHR 3 + , NR 4 + ).
  • Optical isomers can be separated by a number of techniques including chiral chromatography (chromatography on a chiral support) and such techniques are well known to the person skilled in the art.
  • compositions containing a compound of the formula (I) having one or more chiral centres wherein at least 55% (e.g. at least 60%, 65%, 70%, 75%, 80%, 85%, 90% or 95%) of the compound of the formula (I) is present as a single optical isomer (e.g.
  • Esters such as carboxylic acid esters and acyloxy esters of the compounds of formula (I) bearing a carboxylic acid group or a hydroxyl group are also embraced by Formula (I).
  • formula (I) includes within its scope esters of compounds of the formula (I) bearing a carboxylic acid group or a hydroxyl group.
  • formula (I) does not include within its scope esters of compounds of the formula (I) bearing a carboxylic acid group or a hydroxyl group.
  • R is an acyloxy substituent, for example, a C 1-7 alkyl group, a C 3-20 heterocyclyl group, or a C 5-20 aryl group, preferably a C 1-7 alkyl group.
  • the amine (XIX) can be reacted with the boronate ester (XV) under the Suzuki coupling conditions described above to yield the amine (XX).
  • the coupling of the aryl or heteroaryl group E to the pyrazole is accomplished by reacting a halo-pyrazole or halo-aryl or heteroaryl compound with a boronate ester or boronic acid in the presence of a palladium catalyst and base.
  • boronates suitable for use in preparing compounds of the invention are commercially available, for example from Boron Molecular Limited of Noble Park, Australia, or from Combi-Blocks Inc, of San Diego, USA. Where the boronates are not commercially available, they can be prepared by methods known in the art, for example as described in the review article by N. Miyaura and A. Suzuki, Chem. Rev. 1995, 95, 2457 .
  • EDC 1-ethyl-3-(3'-dimethylaminopropyl)-carbodiimide
  • EDC 1-ethyl-3-(3'-dimethylaminopropyl)-carbodiimide
  • uronium-based coupling agents such as O -(7-azabenzotriazol-1-yl)- N , N , N ', N '-tetramethyluronium hexafluorophosphate (HATU) and phosphonium-based coupling agents such as 1-benzo-triazolyloxytris-(pyrrolidino)phosphonium hexafluorophosphate (PyBOP) ( Castro et al, Tetrahedron Letters, 1990, 31, 205 ).
  • the coupling reaction is typically carried out in a non-aqueous, non-protic solvent such as acetonitrile, dioxan, dimethylsulphoxide, dichloromethane, dimethylformamide or N-methylpyrrolidine, or in an aqueous solvent optionally together with one or more miscible co-solvents.
  • a non-aqueous, non-protic solvent such as acetonitrile, dioxan, dimethylsulphoxide, dichloromethane, dimethylformamide or N-methylpyrrolidine
  • an aqueous solvent optionally together with one or more miscible co-solvents.
  • the reaction can be carried out at room temperature or, where the reactants are less reactive (for example in the case of electron-poor anilines bearing electron withdrawing groups such as sulphonamide groups) at an appropriately elevated temperature.
  • the reaction may be carried out in the presence of a non-interfering base, for example a tertiary amine such as triethyl
  • the amide coupling reaction can be carried out using 1,1'-carbonyldiimidazole (CDI) to activate the carboxylic acid before addition of the ammonia.
  • CDI 1,1'-carbonyldiimidazole
  • a reactive derivative of the carboxylic acid e.g. an anhydride or acid chloride
  • Reaction with a reactive derivative such an anhydride is typically accomplished by stirring the amine and anhydride at room temperature in the presence of a base such as pyridine.
  • the amide (XXVIII) can be converted to a compound of the formula (XXX) (which corresponds to a compound of the formula (I) wherein A has an oxo substituent next to the NR 2 R 3 group) by reaction with a boronate (XV) under Suzuki coupling conditions as described above.
  • the amide (XXX) can subsequently be reduced using a hydride reducing agent such as lithium aluminium hydride in the presence of aluminium chloride to give an amine of the formula (XXXI) (which corresponds to a compound of the formula (I) wherein A is CH-CH 2 -CH 2 -).
  • the reduction reaction is typically carried out in an ether solvent, for example diethyl ether, with heating to the reflux temperature of the solvent.
  • the amide may instead be reduced with lithium aluminium hydride/aluminium chloride, for example in an ether solvent at ambient temperature, to give the amine (XXIX) which is then reacted with the boronate (XV) under the Suzuki coupling conditions described above to give the amine (XXX).
  • the carboxylic acid (XXVII) can be converted to the azide by standard methods and subjected to a Curtius rearrangement in the presence of an alcohol such as benzyl alcohol to give a carbamate (see Advanced Organic Chemistry, 4th edition, by Jerry March, John Wiley & sons, 1992, pages 1091-1092 ).
  • the benzylcarbamate can function as a protecting group for the amine during the subsequent Suzuki coupling step, and the benzyloxycarbonyl moiety in the carbamate group can then be removed by standard methods after the coupling step.
  • the benzylcarbamate group can be treated with a hydride reducing agent such as lithium aluminium hydride to give a compound in which NR 2 R 3 is a methylamino group instead of an amino group.
  • Intermediate compounds of the formula (X) where the moiety X is a chlorine, bromine or iodine atom and A is a group CH-CH 2 - can be prepared by the reductive amination of an aldehyde compound of the formula (XXXII): with an amine of the formula HNR 2 R 3 under standard reductive amination conditions, for example in the presence of sodium cyanoborohydride in an alcohol solvent such as methanol or ethanol.
  • the aldehyde compound (XXXII) can be obtained by oxidation of the corresponding alcohol (XXXIII) using, for example, the Dess-Martin periodinane
  • Cyclic intermediates of the formula (XXXIV), where R 1 is an aryl group such as an optionally substituted phenyl group, can be formed by Friedel Crafts alkylation of an aryl compound R 1 -H with a compound of the formula (XXXV):
  • the alkylation is typically carried out in the presence of a Lewis acid such as aluminium chloride at a reduced temperature, for example less than 5 °C.
  • a Lewis acid such as aluminium chloride
  • an aldehyde of the formula (XXXVI) can be coupled with an amine of the formula HNR 2 R 3 under reductive amination conditions as described above.
  • A' is the residue of the group A - i.e. the moieties A' and CH 2 together form the group A.
  • the aldehyde (XXXVII) can be formed by oxidation of the corresponding alcohol using, for example, Dess-Martin periodinane.
  • the starting material for the synthetic route shown in Scheme 4 is the epoxide (XXXVIII) which can either be obtained commercially or can be made by methods well known to the skilled person, for example by reaction of the aldehyde Br-E-CHO with trimethylsulphonium iodide.
  • the epoxide (XXXVIII) is reacted with an amine HNR 2 R 3 under conditions suitable for a ring-opening reaction with the epoxide to give a compound of the formula (XXXIX).
  • the ring opening reaction can be carried out in a polar solvent such as ethanol at room temperature or optionally with mild heating, and typically with a large excess of the amine.
  • the amine (XXXIX) is then reacted with an aryl compound R 1 H, typically a phenyl compound, capable of taking part in a Friedel Crafts alkylation (see for example Advanced Organic Chemistry, by Jerry March, pages 534-542 ).
  • an aryl compound R 1 H typically a phenyl compound, capable of taking part in a Friedel Crafts alkylation (see for example Advanced Organic Chemistry, by Jerry March, pages 534-542 ).
  • the amine of formula (XXXIX) is typically reacted with the aryl compound R 1 H in the presence of an aluminium chloride catalyst at or around room temperature.
  • the aryl compound R 1 H is a liquid, e.g. as in the case of a methoxybenzene (e.g. anisole) or a halobenzene such as chlorobenzene
  • the aryl compound may serve as the solvent.
  • hydroxy-intermediate (XXXIX) is for the preparation of the corresponding fluoro-compound.
  • the hydroxy group can be replaced by fluorine by reaction with pyridine:hydrogen fluoride complex (Olah's reagent).
  • the fluorinated intermediate can then be subjected to a Suzuki coupling reaction to give a compound of the formula (I) with a fluorinated hydrocarbon group A.
  • the aldehyde (XXIV) is reacted with a Grignard reagent R 1 MgBr under standard Grignard conditions to give the secondary alcohol (XLI).
  • the secondary alcohol can then be reacted with a compound of the formula (XLII) in which R 2' and R 3' represent the groups R 2 and R 3 or an amine-protecting group, A" is the residue of the group A, and X' represents a hydroxy group or a leaving group.
  • the reaction between compound (XLI) and (XLII) can take the form of an toluene sulphonic acid catalysed condensation reaction.
  • the alcohol (XLI) can first be treated with a strong base such as sodium hydride to form the alcoholate which then reacts with the compound (XLII).
  • the chorine atom in the aryl ether compound (XLVII) is then displaced by reaction with an amine HNR 2 R 3 to give a compound of the formula (XLVIII).
  • the nucleophilic displacement reaction may be carried out by heating the amine with the aryl ether in a polar solvent such as an alcohol at an elevated temperature, for example approximately 100 °C. The heating may advantageously be achieved using a microwave heater.
  • the resulting amine (XLVIII) can then be subjected to a Suzuki coupling procedure with a boronate of the formula (XV) as described above to give the compound (XLIX).
  • the resulting nitrile (LI) may then be reacted with a Grignard reagent R 1 -MgBr to introduce the group R 1 and form the ketone (LII).
  • the ketone (LII) is converted to the enamine (LIV) by reaction with the diphenylphosphinoylmethylamine (LIII) in the presence of a strong base such as an alkyl lithium, particularly butyl lithium.
  • the enamine (LIV) is then subjected to hydrogenation over a palladium on charcoal catalyst to reduce the double bond of the enamine and remove the 1-phenethyl group.
  • the protecting group PG is a trityl group
  • hydrogenation also removes the trityl group, thereby yielding a compound of the formula (LV).
  • the enamine (LIV) can be reduced with a hydride reducing agent under the conditions described in Tetrahedron: Asymmetry 14 (2003) 1309-1316 and subjected to a chiral separation. Removal of the protecting 2-phenethyl group and the protecting group PG then gives an optically active form of the compound of formula (LV).
  • a carboxylic acid of the formula (LXIV) is esterified by treatment with methanol in the presence of an acid catalyst such as hydrochloric acid.
  • the ester (LXV) is then reacted with a strong base such as lithium diisopropylamide (LDA) and an alkyl iodide such as methyl iodide at reduced temperature (e.g. between 0 °C and -78 °C).
  • LDA lithium diisopropylamide
  • an alkyl iodide such as methyl iodide
  • the invention provides compounds of the formula (I) and sub-groups thereof as defined herein in the form of pharmaceutical compositions.
  • swellable crosslinked polymers such as crosslinked carboxymethylcellulose
  • lubricating agents e.g. stearates
  • preservatives e.g. parabens
  • antioxidants e.g. BHT
  • buffering agents for example phosphate or citrate buffers
  • effervescent agents such as citrate/bicarbonate mixtures.
  • a formulation intended for oral administration may contain from 1 nanogram to 2 milligrams, for example 0.1 milligrams to 2 grams of active ingredient, more usually from 10 milligrams to 1 gram, e.g. 50 milligrams to 500 milligrams, or 0.1 milligrams to 2 milligrams.
  • PKB inhibitors may also be useful in diseases resulting from insulin resistance and insensitivity, and the disruption of glucose, energy and fat storage such as metabolic disease and obesity.
  • protein kinase B inhibitors can be used in combination with other anticancer agents.
  • the compounds of the formula (I) will useful in the prophylaxis or treatment of a range of disease states or conditions mediated by protein kinase A and/or protein kinase B. Examples of such disease states and conditions are set out above.
  • the compound of the formula (I) and one, two, three, four or more other therapeutic agents can be, for example, formulated together in a dosage form containing two, three, four or more therapeutic agents.
  • the individual therapeutic agents may be formulated separately and presented together in the form of a kit, optionally with instructions for their use.
  • tumour biopsy samples selected from tumour biopsy samples, blood samples (isolation and enrichment of shed tumour cells), stool biopsies, sputum, chromosome analysis, pleural fluid, peritoneal fluid, or urine.
  • Identification of an individual carrying a mutation in PKA and/or PKB or a rearrangement of TCL-lor loss of PTEN expression may mean that the patient would be particularly suitable for treatment with a PKA and/or PKB inhibitor.
  • Tumours may preferentially be screened for presence of a PKA and/or PKB variant prior to treatment. The screening process will typically involve direct sequencing, oligonucleotide microarray analysis, or a mutant specific antibody.
  • telomere amplification is assessed by creating a cDNA copy of the mRNA followed by amplification of the cDNA by PCR.
  • Methods of PCR amplification, the selection of primers, and conditions for amplification, are known to a person skilled in the art.
  • Nucleic acid manipulations and PCR are carried out by standard methods, as described for example in Ausubel, F.M. et al., eds. Current Protocols in Molecular Biology, 2004, John Wiley & Sons Inc ., or Innis, M.A. et-al., eds. PCR Protocols: a guide to methods and applications, 1990, Academic Press, San Diego .
  • FISH fluorescence in-situ hybridisation
  • PKB beta has been found to be upregulated in 10 - 40% of ovarian and pancreatic cancers ( Bellacosa et al 1995, Int. J. Cancer 64, 280 - 285 ; Cheng et al 1996, PNAS 93, 3636-3641 ; Yuan et al 2000, Oncogene 19, 2324 - 2330 ). Therefore it is envisaged that PKB inhibitors, and in particular inhibitors of PKB beta, may be used to treat ovarian and pancreatic cancers.
  • HPLC System Agilent 1100 series Mass Spec Detector: Agilent LC/MSD VL Multi Wavelength Detector: Agilent1100 series MWD
  • Software HP Chemstation Chiral Analytical conditions: Eluent: MeOH + 0.2% NH4/AcOH at room Temperature Flow: 2.0 ml/min Total time: 8.5 min Inj. Volume: 20 uL Sample Conc: 2 mg/ml Column: Astec, Chirobiotic V; 250x4.6 mm Chiral Preparative conditions 1: Eluent: MeOH + 0.1% NH4/TFA at room Temperature Flow: 6.0 ml/min Total time: 10 min Inj.
  • Benzonitrile 500 mg, 4.849 mmol was added dropwise to a solution of 3-bromobenzylmagnesium bromide (0.275 M solution in diethyl ether, 21.1 ml, 5.818 mmol) under an atmosphere of nitrogen at room temperature.
  • the reaction mixture was then heated to reflux for a period of 2 hours then allowed to cool.
  • Lithium aluminium hydride 1.0 M in THF, 4.85 ml, 4.849 mmol
  • Example 7B The nitrile product of Example 7B was reduced using the conditions described in Example 6 to give the title compound. (LC/MS: (PS-B) R t 3.03 [M+H] + 278.
  • Lithium aluminium hydride was added to a suspension of 3-(3,4-Difluoro-phenyl)-N-methyl-3-[4-(1H-pyrazol-4-yl)-phenyl]-propionamide in diethyl ether, followed by a solution of aluminium chloride in diethyl ether at 0°C, under a nitrogen atmosphere. Toluene was added and the reaction mixture was heated at 70°C for 18 hours. Upon cooling the reaction was quenched with addition of water, basified (2N NaOH) and extracted with ethyl acetate. The organic layer was separated, dried (MgSO 4 ), filtered and concentrated to afford the desired compound.
  • Example 8B To ⁇ 4-[5-Methyl-1-(tetrahydro-pyran-2-yl)-3-trifluoromethyl-1H-pyrazol-4-yl]-phenyl ⁇ -acetonitrile (Example 8B) (35mg, 0.1mmol, 1.0 equiv) in ethyl acetate (1ml) was added HCl in ethyl acetate (1ml) and the mixture was stirred for 1 hour.
  • Example 37B (i) The product of Example 37B can be reacted with benzaldehyde under the conditions described in Example 2 to give 2-[4-(5-methyl-1-(tetrahydro-pyran-2-yl)-3-trifluoromethyl-1H-pyrazol-4-yl)-phenyl]-3-phenyl-propionitrile which can be deprotected by removal of the 1-tetrahydropyranyl group under the conditions set out in Example 37C to give 2-[4-(5-methyl-3-trifluoromethyl-1H-pyrazol-4-yl)-phenyl]-3-phenyl-propionitrile.
  • Example 37B can also be reacted with benzyl magnesium bromide or phenyl magnesium bromide under the Grignard reaction conditions described in Example 5 to give (following deprotection by the method of Example 37C) 1-benzyl-2-[4-(5-methyl-3-trifluoromethyl-1H-pyrazol-4-yl)-phenyl]-ethylamine and 2- [4-(5-methyl-3-trifluoromethyl-1H-pyrazol-4-yl)-phenyl]-1-phenylethylamine respectively.
  • 3-(1H-Pyrazol-4-yl)-phenyl]-acetonitrile can be used as an intermediate in the preparation of compounds of the formula (I), for example by means of an aldehyde condensation reaction as described in Example 2 or a Grignard reaction as described in Example 5.
  • Aluminium chloride (278mg, 2.087mmol) was added portionwise to a stirred solution of 1-(4-Bromo-phenyl)-2-methylamino-ethanol (160mg, 0.696mmol) in chlorobenzene (3ml) and the reaction mixture stirred at room temperature for 17 hours. Water (2ml) was added dropwise and the reaction mixture was then partitioned between dichloromethane (100ml) and saturated NaHCO 3 (30ml). The organic layer was dried (MgSO 4 ), filtered and concentrated under reduced pressure. The crude product was then purified by Phenomenex_Strata_SCX column chromatography eluting with methanol followed by 2N ammonia in methanol to afford the desired product. LC/MS: (PS-B3) R t 3.58 [M+H] + 324.
  • the aqueous layer was separated and extracted further with ethyl acetate (10ml)).
  • the combined organic liquors were washed with saturated brine, dried (MgSO 4 ) and concentrating in vacuo.
  • the residue was dissolved in anhydrous toluene (12ml) before addition of benzyl alcohol (567ul, 9.27mmol) and heating to 80°C for 40 minutes.
  • the reaction was allowed to cool to room temperature before addition of ethyl acetate (50ml) and saturated sodium bicarbonate (50ml).
  • Lithium aluminium hydride (5.3ml, 5.30mmol, 1M in tetrahydrofuran) was slowly added to ⁇ 2-(4-Fluoro-phenyl)-2-[4-(1H-pyrazol-4-yl)-phenyl]-ethyl ⁇ -carbamic acid benzyl ester (439mg, 1.06mmol) in tetrahydrofuran (5ml) at 0°C under nitrogen.
  • the reaction mixture was allowed to warm to room temperature, stirred for 51 hours and quenched with water (5ml), aqueous sodium hydroxide (2N, 5ml) and ethyl acetate (10ml).
  • Trifluoroacetic acid (1ml) was added to a solution of 4-[4-(2-Methoxy-ethoxy)-phenyl]-4-[4-(1H-pyrazol-4-yl)-phenyl]-piperidine (87mg) in dichloromethane (1ml). After 30 minutes at room temperature, the reaction was concentrated. The residue was dissolved in ethyl acetate then extracted into hydrochloric acid (2N, 2x20ml). The combined aqueous fractions were washed with ethyl acetate then basified (2N NaOH) before back-extraction into ethyl acetate (2x20ml).
  • Tosyl chloride (572mg, 3.0mmol) was added to a solution of 3-methoxypropanol (191ul, 2.0mmol) in pyridine (1ml). This was stirred at room temperature for 5.5 hours then diluted with ethyl acetate (20ml) and washed with hydrochloric acid (2N, 3x10ml) and saturated brine (10ml). The liquors were dried (MgSO 4 ) and concentrated to furnish a colourless oil (600mg).

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HK1097543A1 (en) 2007-06-29
IL176400A0 (en) 2006-10-05
AU2004303602A1 (en) 2005-07-07
PL1706385T3 (pl) 2011-03-31
BRPI0418078A8 (pt) 2018-01-02
US20140271662A1 (en) 2014-09-18
KR101164258B1 (ko) 2012-07-11
US8247576B2 (en) 2012-08-21
AU2004303602B2 (en) 2008-12-18
CA2548374C (en) 2014-05-27
HRP20100675T1 (hr) 2011-01-31
UY28946A1 (es) 2006-01-31
CY1111493T1 (el) 2015-08-05
NZ547696A (en) 2009-12-24
JP2007516272A (ja) 2007-06-21
AU2004303602C1 (en) 2009-05-28
BRPI0418078A (pt) 2007-04-17
US20110144080A1 (en) 2011-06-16
WO2005061463A1 (en) 2005-07-07
US9283226B2 (en) 2016-03-15
US20160250187A1 (en) 2016-09-01
EP1706385A1 (de) 2006-10-04
MXPA06007326A (es) 2007-01-26

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